July 11-12:BILLINGS, MONTANA: Annual show; Billings Gem and Mineral Club; Sat. 10-5, Sun. 10-4; Free admission!
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 Post subject: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 5:17 am 
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Found this in Facebook.

http://www.facebook.com/photo.php?fbid= ... nt&theater


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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 6:21 am 
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Hmm. Does that mean a filling with elementar Pb was added to simulate a pattern of natural looking mineral inclusions? I am a bit confused.

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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 11:33 am 
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Lead is a very common component in glass. Waterford Crystal is 40% lead.
The earliest known example of lead glass is blue! It dates to 1400 BC.
Bristol Blue Glass made in the UK since the 1700's is made with cobalt and lead, specifically 24% lead oxide.


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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 2:08 pm 
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Which is why you never leave alcohol stored in lead-glass crystal [-X . Decant it back to its original bottle.

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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 4:09 pm 
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I like my fuel unleaded and my liquor leaded. Or is it the other way around? I forget, they taste so similar.


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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 4:17 pm 
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I do not believe that lead is soluble in alcohol. It is the acids in wine that can be problematic. Spirits should not be a problem.

Someone correct me if I have it wrong.

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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 4:29 pm 
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Actually, I think you'll find any liquid left in lead-crystal glass will eventually leach out some of the lead. Wine, spirits, kool-aid ... choose your "poison" 8)

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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 5:38 pm 
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Perhaps, if you have ever stored your Scotch in a Lead Crystal Decanter for a length of time, you've noticed an iridescent film on top of your whiskey....that's lead.


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 Post subject: Re: Pb Filling in Blue Sapphire
PostPosted: Mon Nov 21, 2011 5:41 pm 
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Duly noted.

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